Lasting-jack



(No Model.

- G. W. HUTOHINS.

Lasting Jack.

Patented June 28,

UNITED STATES PATENT OFFICE.

GEORGE W. HUTCHINS, OF DOVER, ASSIGNOR TO GEORGE L. STAOKPOLE, OFROCHESTER, NEW HAMPSHIRE.

LASTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 243,376, dated June 28,1881.

Application filed November 11, 1880. (No model.)

' of New Hampshire, have invented certain new and useful Improvements inSelf-Adjusting Lasting-Jacks, of which the following is a specification.

The objects of my invention are to provide a lasting-jack withself-adjusting mechanism which shall tend to hold or confine the last,with theboot or shoe being lasted, more rigidly as the same is pressedor forced downward within the jack in the act of lasting, and to allowthe same to become free instantly when the downward pressure is removed.Such action greatly facilitates the operations, thereby removin gtheobjections to lastin g-j acks as heretofore constructed, wherein springsor weights were employed to actuate theholdingmechanism, and the forceof which required to be overcome in order to release or change theposition of the boot or shoe being lasted; and it consists, primarily,in the construction of an incline slot or bearing-surface upon which thelower end of the pivoted standard of the toesupport rests or has ahearing when the jack is in use; and it further consists in the detailsof construction hereinafter more fully described and set forth.

Figure 1 represents a perspective view of a lasting-jack constructedaccording to my invention. Fig. 2 represents an elevation of the same.

A represents the leg-supports and feet of the lastingjack, adapted to bescrewed to the floor, and are provided at their intersection or upperportion with a vertical socket, B, into which is fitted the verticaladjustable standard 0, the lower end of which is held at the desiredposition in said socket by a set-screw, D, while the standard ispermanently secured in an .uprightposition by means of abracket, E,secured to the edge of the bench and provided with a socket, F, throughwhich the standard 0 passes, and is held therein by means of aset-screw, G. To the upper end of the said standard 0 is pivoted thesocket K of the curved base-support H of the lasting-jack proper. Thisbase-support H is held from turning or swiveling too freely by means ofa friction-spring, I, and setscrew J, passing through the saidbase-support and entering the upper end of the standard O, as shown.This base-supportHis provided with an upward-curved arm, L, to the upperend of which is pivoted the vertical 5 5 heel-standard M, thisheel-standard being formed with a peculiarly-curved arm, N, extendingfrom its base or connection with the support H in an upward and outwarddirection, its outward-curved portion W being slotted vertically fromits end inwardly, as shown in Fig. 1. To the outward-curved end of thisslotted armN is pivoted the toe-support standard O, which is adjustedtherein by .means of a series of holes to receive the pivot-bolt Q; soas to adapt the capacity of the jack to the various sizes of lasts inuse. The base-support H is provided opposite its arm L with an outwardand upward curved arm, P, which is formed with an abrupt turn inward,forming an elbow, from which extends an upward inclinehorizontally-slotted arm, R, at the upper end of which slot is formed anotch, S, in the lower portion of the arm R, so as to receive the pin orbolt '1, which passes through the bifurcated 7 5 lower end of thetoe-support standard 0 and through the horizontal slot formed in thesaid incline arm R so as to hold the jack in an open positiontemporarily, as shown in Fig. 2.

It will be obvious that thehorizontal incline slot in the said arm R maybe dispensed with by forming the incline arm R with a bearingsurface andnotch S on its upper face corresponding to the slot, then providing thebifurcated lower end of the toe-support standard 8 5 with the-pin T andextending the lower ends of the said standard 0 below the said inclinearm R, then by inserting a pin through them below arm R, and then, byinserting a stop-pin through the upper end of the incline arm R the sameresult and operation would be accomplished as by the previous describedmechanical devices.

It will be understood that when the lastingjack is in use a suitablestrap, if desired, may 5 be put or passed through the short slot orholeV formed about mid-length of the curved arm N, and passed over or aroundthe boot or shoe being lasted, and thence downward to near the floor,where it is held or released by the foot of the operator, as desired,and as heretofore.

The bolt or pin T rests or has abearing upon the surface of the inclineslot in arm B, so as to slide downward freely when in use, so that allpressure downward upon a boot or shoe being lastedtends to more firmlyhold the same within the jack, and-when freed from such pressure isinstantly and entirely released.

Having thus described my invention, 'what I claim is- 1. Thecombination, with the base'support H, provided with the curved arm L, tothe upper end of which is pivoted the heel-standard M, and to theopposite curved arm P is pivoted the toe-support standard 0, itsbifurcated lower end having the pin or bolt T of the incline slotted armR of the base H, having at its upper end the notch S, said bolt T beingadapted to operate in said incline slot and notch S, substantially asdescribed, as and for the purposes set forth.

2. In a lasting-jack, the combination, with the pivoted heel-standard Mand pivoted toesupport standard O, of the arm It, provided with theincline slot or incline bearing-surface upon which said toe-supportrests, whereby the adjustment of the jack is rendered automatic, as andfor the purposes set forth.

3. An automatic lasting-jack consisting of the base-support H, havingcurved armsL and P and incline slotted arm It, the said curved 'arm Lhaving pivoted thereto the heel-stand-

